The rpime minister pointed out that India is now looked upon as a nursery of unicorn start-ups (worth more than a billion dollars), for which one of the biggest source of talent in this revolution are the IITs in the country.

"That India is emerging as the hub for start-ups shows the thirst for innovations... We must make India as the most attractive destination for innovations and enterprise," Modi added.

"We must build on this... It will not happen only through government efforts but by youngsters here... The best ideas come in their minds and not in government offices," Modi said.

He appealed to the young IIT graduates to innovate in India. Innovate for humanity, mitigating climate change to ensure better agricultural productivity, water conservation, clean energy, combat malnutrition, effective waste management and other areas.

Earlier, the IIT-B conferred an honorary Doctor of Science on former alumnus, Romesh T. Wadhvani, the founder-chairman of Symphony Technology Group in California, US.

Modi gave away gold medals to three top distinguished students of IIT-B and silver medals to 43 others in various categories.

Later, Modi inaugurated the new building of the Department of Energy Science and Engineering and the Centre for Environmental Science and Engineering, at the IIT-B, that has been selected as one of the Institutions of Eminence by the government.